What is Impulse: Definition and 929 Discussions

In the field of consumer behavior, an impulse purchase or impulse buying is an unplanned decision by a consumer to buy a product or service, made just before a purchase. One who tends to make such purchases is referred to as an impulse purchaser, impulse buyer, or compulsive buyer. Research findings suggest that emotions, feelings, and attitudes play a decisive role in purchasing, triggered by seeing the product or upon exposure to a well crafted promotional message.

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  1. O

    Force and Impulse on a Railway Locomotion

    Homework Statement A railway locomotive pushed a stationary wagon and accelerated to 4ms. Did the same to another wagon with same force and time and accelerated it to 6ms. The two now stationary wagons are bow locked together and the same impulse force is applied to the wagons to move them...
  2. Np14

    Impulse applied to a bouncing ball

    Homework Statement A 0.500 kg ball is dropped from rest at a point 1.20 m above the floor. The ball rebounds straight upward to a height of 0.700 m. What are the magnitude and direction of the impulse of the net force applied to the ball during the collision with the floor? Homework...
  3. Np14

    Why is momentum conservation always true in a collision?

    Homework Statement Two blocks of mass 2M and M head toward each other sliding over a frictionless surface sliding with speeds 4v and 6v respectively. After the collision the 2m mass is at rest, and the mass M has a velocity of 2V to the right. Was the collision elastic or inelastic? a...
  4. O

    Impulse and Momentum: Ball and cart connected by a cord

    Homework Statement [/B] A 1kg cart, a 0.1kg ball, and an elastic cord connecting the ball and the cart, are placed in a weightless environment; see Figure. The cart has the shape of a symmetric trapezoid with its left and right edges at a 60-deg angle from the vertical. It is also attached with...
  5. M

    How to calculate rebound speed of ball hitting a wall?

    Homework Statement A ball of mass 0.075 is traveling horizontally with a speed of 2.20 m/s. It strikes a vertical wall and rebounds horizontally. Due to the collision with the wall, 20% of the ball's initial kinetic energy is dissipated. Show that the ball rebounds from the wall with a speed of...
  6. delta76

    The impulse of an object during deployment

    how do I find the impulse of an object when it is deployed. (here is an image of the deployment method, It is just a string) Thanks so much! delta
  7. G

    Impulse Load Timestep: Reverse Engineering to Obtain dt?

    Hi I have a question regarding the dt timestep of an impulse load as discussed in the following video: He uses dt=10ms. If we set dt=8 or 9 or 11 we get widely different values for Fmax. Thus, a lot of such impulse loading boils down to the correct selection of dt. I was wondering if...
  8. Persson

    Exploring the Relationship between Impulse and Work in Rocket Dynamics

    Homework Statement I have a hipotetic rocket that have a power of 3000 watt, however its position don't change because the effect of a gravity of 10m/s^2 do the rocket remains like it would be resting. I need to determine the mass of the rocket. In a similar problem I have a rocket also in an...
  9. Amitayas Banerjee

    Calculate the impulse of tension

    Homework Statement Homework Equations $$ J \space (\text{Impulse})= \Delta (mv) = F \times \Delta (t) $$ The Attempt at a Solution As much I interpreted, we have to calculate the impulse caused by the tension till the relative velocity of approach along the string becomes 0. T to this, I...
  10. sal1234

    Find Minimum Height to Lift 4kg Mass with 0.1kg Block & Pulley

    Homework Statement Two blocks of mass(4 Kg and 0.1 Kg ) are connected by a mass less string that passes over a friction less pulley.The 4 Kg mass rests on the ground and the 0.1 Kg is hanging above the ground.Find the minimum distance from which the 0.1 Kg mass can be lifted and drop so...
  11. Krushnaraj Pandya

    Application of angular impulse to a problem

    Homework Statement two discs of radii r and 2r are pressed against each other. Initially disc with radius r is rotating with angular velocity w and other disc was stationary. Both discs are hinged at their respective centers and free to rotate about them Moment of inertia of 1st disc is I and...
  12. A

    Trying to intuit the unit impulse response

    Homework Statement Hi there, I've been trying to gain some intuition on how the convolution sum works, but as I dig deeper I am realizing that there is an issue with my intuition of signals and systems, in particular the unit impulse response. My issue is trying to understand how a unit...
  13. Igor Oliveira

    Describing the translation and rotation of a square frame

    Homework Statement Four equal discs of mass ocuppy the vertices of a square frame made by four rigid bars of length and negligible mass. The frame is at rest on a horizontal table, and it can move with negligible friction. An instantaneous impulse is transmitted to one of the masses, in the...
  14. H

    Relationship of Young's modulus and impulse force

    Homework Statement Is that possible to obtain the a relationship between Young's modulus of a spring and impulse force with below information ? I personally think that we cannot if without the given cross-sectional area A and the given spring constant k. The particle is connect to a elastic...
  15. N

    Calculating the magnitude of an impulse

    Homework Statement Aplayer bounces a 0.43-kg soccer ball off her head, changing the velocity of the ball from Vi = (8.8 m/s)x + (-2.3 m/s)y to Vf = (5.2 m/s)xN + (3.7 m/s)y[/B] . If the ball is in contact with the player’s head for 6.7 ms, what are (a) the direction and (b) the magnitude of...
  16. ubergewehr273

    Problem about an impulse and a spring

    Homework Statement The attached image. Homework Equations Momentum conservation Conservation of mechanical energy The Attempt at a Solution I tried conserving momentum, ##P=mv_{1} + Mv_{2}## and then conserving M.E., P^2/(2m)=1/2##mv_1{1}^2## + 1/2##Mv_{2}^2## After that I can't seem to...
  17. isukatphysics69

    Impulse and momentum problem pool balls

    1. Homework Statement in picture Homework Equations momentuma+momentumb=momentum of system The Attempt at a Solution So i just spent 1 hour trying to solve this problem and got completely stuck when trying to solve for the angle of ball 2 in the final position i ended up with an equation...
  18. isukatphysics69

    What is the direction of the impulse in this problem?

    1. Homework Statement In picture above Homework Equations impulse = Δp[/B]The Attempt at a Solution 4.28NS = Δp 4.28NS = pfinal - pinitial 4.28NS + 0.18kg*0.16m/s = pfinal (4.28NS + 0.18kg*0.16m/s)/.18kg = vfinal vfinal = 39.77777778m/s Now i got the direction incorrect but the magnitude...
  19. M

    Impulse Question -- A car changing speed and direction

    Homework Statement Cart travels with a mass of 100kg in the 25m/s in the X-Direction and then 20m/s in the Y-Direction. What is the impulse? Homework Equations I = m*change in velocity The Attempt at a Solution I = 100(20 (j) - 25(i)) I = (2000 (j) - 2500(j)) kg* m/s Is this correct?
  20. J

    Impulse from position time graph

    Homework Statement Homework EquationsThe Attempt at a Solution I think none of the options are correct . It is a uniform motion between t=0 and t=2 sec. Velocity is constant . Impulse is given by m∆v .Since ∆v = 0 , impulse is zero at t= 2 sec . Is that correct ?
  21. Z

    Impulse: multiple choice question

    Hi all Can anyone please help me with Q14 (attached) as you can see I am getting 167000N however the correct answer is 83000N Many thanks ZanyZoya
  22. E

    How do we know how long the force is acting on an object?

    Hey all, so I'm self studying and I came across this question: A ## 2 kg ## cart, traveling on a horizontal air track with a speed of ## 3 m/s##, collides with a stationary ##4 kg## cart. The carts stick together. The impulse exerted by one cart on the other has a magnitude of: A. ## 0 ## B...
  23. S

    Ball hitting baseball bat (with no impulse)

    Homework Statement Given the setup above, what distance x should the ball be away so that there is no impulse reaction at A? Homework Equations Conservation of Linear and Angular momentum. The Attempt at a Solution Conservation of linear momentum (←+) (considering the bat alone) M(vg1) + ∑...
  24. SothSogi

    Find Distance d for Impulse on Stick to Rotate Once

    Homework Statement (Sorry for not typing like Latex, I still do not know how) One has a uniform stick of length l which is held horizontally. At t=0 it is released from rest. At the same time, a sharp upward blow by a force of magnitude F perpendicular to the stick is applied at a distance d...
  25. J

    Output of transfer function given impulse response and input the

    Homework Statement Homework Equations Find laplace of x(t) and h(t) Multiply the laplaced values to get Y(s) Find inverse laplace to get y(t) The Attempt at a Solution In book the circled term isn't there. Why does that go away? Book gets y(t) as In laplace why does the e5t term go away?
  26. J

    Impulse reponse from step response

    Homework Statement Homework Equations Derivative of step response is impulse response The Attempt at a Solution [/B] I marked A cause it matches the other coefficients. But where does 9 come from in the last term. I tried with laplace and got the last term as 9. But how to get that in time...
  27. J

    Step Response from the Impulse Response

    Homework Statement Homework Equations Use Laplace then multiply in laplace domain then do laplace inverseThe Attempt at a Solution Book answer is A I don't get the first term of eat in option A.[/B]
  28. J

    Sequental elastic and inelastic collisions

    Homework Statement A taxi car weighing 2000kg hits a stationary mini-van that has a mass of 2200kg. The taxi stops and the mini-van rolls and hits a stationary sports car with a mass of 1830kg. Their bumbers hit and they move together at 2.3m/s. What is the velocity of the taxi before the...
  29. jsg94

    Determine impulse response given input and output signals

    Homework Statement Hello everyone, In the following problem I have to find the unknown impulse response g1(t) given the input and output signals, as shown below: (the answer is already there, at the moment I am trying to understand how to get there). Homework Equations [/B] I have...
  30. Specter

    Impulse and momentum in two dimensions - Finding velocity

    Homework Statement In a physics lab, 0.30 kg puck A, moving at 5.0 m/s [W], undergoes a collision with a 0.40 kg puck B, which is initially at rest. Puck A moves at 4.2 m/s [W 30 N] . Find the final velocity of puck B. Homework Equations Conservation of momentum Pythagorean theorum The...
  31. Specter

    Impulse and momentum in one dimension - Two carts are moving

    Homework Statement [/B] In an elastic head-on collision, a 0.60 kg cart moving at 5.0 m/s [W] collides with a 0.80 kg cart moving at 2.0 m/s [E]. The collision is cushioned by a spring (k=1200 N/m). a) Find the velocity of each cart after the collision b) Find the maximum compression of the...
  32. A

    How does changing the duration of a collision affect impulse

    Homework Statement Car bumpers are able to reduce the force of an impact by allowing the force to the spread over a greater duration of time. I am wondering how this affects the impulse between collisions because while increasing the time it is decreasing the force, both of which are...
  33. E

    Simple Concept Question Regarding Impulse and Momentum

    It's simple to everyone but me haha 1. Homework Statement We toss an egg onto the floor, and it breaks. We toss an egg onto a pillow on the floor, and it does not break. The egg that does not break experiences a smaller: A. Impulse B. Change in momentum C. Maximum ForceHomework Equations...
  34. S

    Two spheres of are dropped to ground while in contact.

    Two spheres of different masses are dropped to ground.They are in contact as one above the other and are of masses, let’s say m and 2m.They are dropped with velocity v - My question is if we can conserve momentum and if we can why?And how to find the final velocity of upper ball after collision...
  35. W

    Change in Momentum of a Hockey Puck

    Homework Statement A hockey player hits a slap shot, exerting a constant force on a 3.06 kg puck for 0.06 seconds. What is the change in momentum of the puck? Homework Equations Impulse = Mass x (Change in velocity) = Force x time (I think that’s all needed? Most likely missing one.) The...
  36. Jayalk97

    Solving for the impulse response of a discrete time system?

    Hey guys I was just studying for finals and I came across something in my textbook that either wasn't explained properly or something I just don't get. So this page explains that the coefficient of y_n[k] is A_0, which is represented by b_0/a_0, I can see that a_0 is determined by multiplying...
  37. M

    Kinematics question -- Impulse applied to a plate hanging from a wall

    Homework Statement A circular plate with radius 0.5 m and mas 5 kg is hung on the wall, fixed at a point that is 0.3 m above its center. The plate can freely rotate about the fixed point with no friction. A very short-duration impulse of 5Ns, along a direction that is tangential to the...
  38. R

    Engineering Impulse Response of an RLC Circuit

    I bolded the portions I need help with. 1. Homework Statement A series circuit consists of a resistor with a resistance of 16 ohms, an inductor with inductance of 2 H, and a capacitor with a capacitance of 0.02 F. At time t = 0 there is no charge on the capacitor and no current in the circuit...
  39. F

    Calculating Final Velocities in 2D Inelastic Collisions

    Hi there, so I'm not sure if this is allowed or not, but usually before I submit my work I try to check it on the internet to get full marks. I do the work as best as I can to try and get the best understanding of the subject possible. I think a) is correct but I think I messed up somewhere in...
  40. lahanadar

    Interpretation of the system response to a unit impulse

    Hi, I want to understand the meaning of unit impulse response when time flows. An example is given below: In the example the left signal depicts a δ[n] function value of which is 1 only at n=0. The LHS signal is response of the system to the unit impulse. I want to understand how to...
  41. T

    Average Force of two people pushing away on carts

    Homework Statement What is the Average Force between m1 and m2. Show all work. Note that the masses are both at rest, and begin to push off of each other in opposite directions. Their velocity is measured when they reach 20cms distance. (I calculated the velocity when they reached this point...
  42. M

    Impulse Problem- time-average of normal force when running

    1. The problem statement, all variables, and given/known data A somewhat paraphrased version of the problem: Consider the vertical motion of the center of mass of a 150 lbs person as they run along a track. Suppose the person's cadence is 4 steps per second, and with every stride, they briefly...
  43. B

    Area under the curve of a mass time graph

    Homework Statement Homework Equations Force * time = mass * change in velocity[/B]The Attempt at a Solution What I did was I converted the y-axis from kilograms to Newtons, since the "mass" reading is the force that the scale experiences. Then, the area under the curve will be the change...
  44. S

    Impulse and momentum in two dimensions - velocity question

    Homework Statement Sorry for another question so soon, I am not sure if there is a limit on how many I can ask. I try to keep it to a minimum but sometimes I can't figure it out on my own. Question: In a physics lab, 0.30 kg puck A, moving at 5.0 m/s [W], undergoes a collision with 0.40 kg...
  45. W

    Newton's 3rd law and an impulse

    If I have a superball and a tomato of the same mass in my hand, and I let it go. The only force acting on my superball and tomato is gravitational force. F=ma, they have same mass so they will hit the bathroom scale with the same force. According to Newton's third law, the bathroom scale will...
  46. J

    Calculate change in KE and momentum (impulse)

    Homework Statement I have attached the problem. A 14,000 kg tractor traveling north at 21 km/h turns west and travels 26 km/h. Calculate the change in the tractor's a. kinetic energy b. linear momentum (magnitude AND direction) Homework Equations [/B] delta KE = (1/2)mv^2 - (1/2)mvi^2...
  47. I

    Calculating Impulse and Force: Understanding the Concept Behind It

    This is in relation to a homework question: But I don't need assistance on the question itself, but the concept behind it. A mass of .4kg travels in the positive direction for 67m/s until a separate force is applied to M in the negative direction at 14m/s for .027 seconds. Impulse = 32.4 It...
  48. C

    I Stress exerted on a wooden cube dropped on concrete floor

    I wonder if it is possible to at least estimate the stress (or the impact force) that the cube in question will experience due to the collision with the concrete floor. Assumptions: 1. The cube is dropped from height h 2. The cube is relatively small, thus we can neglect air resistance...
  49. T

    Impulse imparted to A by B during collision

    Homework Statement Small object A (mass: [m][/A]) is traveling in a linear path on a horizontal surface and collides elastically with small object B ([m][/B]), at rest on the same line, with a speed of v. Friction between the objects and the horizontal surface is negligible. What is the...
  50. G

    Impulse and Momentum: What's the Difference?

    Why are impulse and momentum treated as different quantites?
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